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mutter-performance-source/cogl/cogl-renderer.c
Robert Bragg a0441778ad This re-licenses Cogl 1.18 under the MIT license 
Since the Cogl 1.18 branch is actively maintained in parallel with the
master branch; this is a counter part to commit 1b83ef938fc16b which
re-licensed the master branch to use the MIT license.

This re-licensing is a follow up to the proposal that was sent to the
Cogl mailing list:
http://lists.freedesktop.org/archives/cogl/2013-December/001465.html

Note: there was a copyright assignment policy in place for Clutter (and
therefore Cogl which was part of Clutter at the time) until the 11th of
June 2010 and so we only checked the details after that point (commit
0bbf50f905)

For each file, authors were identified via this Git command:
$ git blame -p -C -C -C20 -M -M10  0bbf50f905..HEAD

We received blanket approvals for re-licensing all Red Hat and Collabora
contributions which reduced how many people needed to be contacted
individually:
- http://lists.freedesktop.org/archives/cogl/2013-December/001470.html
- http://lists.freedesktop.org/archives/cogl/2014-January/001536.html

Individual approval requests were sent to all the other identified authors
who all confirmed the re-license on the Cogl mailinglist:
http://lists.freedesktop.org/archives/cogl/2014-January

As well as updating the copyright header in all sources files, the
COPYING file has been updated to reflect the license change and also
document the other licenses used in Cogl such as the SGI Free Software
License B, version 2.0 and the 3-clause BSD license.

This patch was not simply cherry-picked from master; but the same
methodology was used to check the source files.
2014-02-22 02:02:53 +00:00

863 lines
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/*
* Cogl
*
* A Low Level GPU Graphics and Utilities API
*
* Copyright (C) 2011 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "cogl-util.h"
#include "cogl-private.h"
#include "cogl-object.h"
#include "cogl-context-private.h"
#include "cogl-util-gl-private.h"
#include "cogl-renderer.h"
#include "cogl-renderer-private.h"
#include "cogl-display-private.h"
#include "cogl-winsys-private.h"
#include "cogl-winsys-stub-private.h"
#include "cogl-config-private.h"
#include "cogl-error-private.h"
#ifdef COGL_HAS_EGL_PLATFORM_XLIB_SUPPORT
#include "cogl-winsys-egl-x11-private.h"
#endif
#ifdef COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT
#include "cogl-winsys-egl-wayland-private.h"
#endif
#ifdef COGL_HAS_EGL_PLATFORM_KMS_SUPPORT
#include "cogl-winsys-egl-kms-private.h"
#endif
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
#include "cogl-winsys-egl-gdl-private.h"
#endif
#ifdef COGL_HAS_EGL_PLATFORM_ANDROID_SUPPORT
#include "cogl-winsys-egl-android-private.h"
#endif
#ifdef COGL_HAS_EGL_PLATFORM_POWERVR_NULL_SUPPORT
#include "cogl-winsys-egl-null-private.h"
#endif
#ifdef COGL_HAS_GLX_SUPPORT
#include "cogl-winsys-glx-private.h"
#endif
#ifdef COGL_HAS_WGL_SUPPORT
#include "cogl-winsys-wgl-private.h"
#endif
#ifdef COGL_HAS_SDL_SUPPORT
#include "cogl-winsys-sdl-private.h"
#endif
#ifdef COGL_HAS_XLIB_SUPPORT
#include "cogl-xlib-renderer.h"
#endif
typedef const CoglWinsysVtable *(*CoglWinsysVtableGetter) (void);
#ifdef HAVE_COGL_GL
extern const CoglTextureDriver _cogl_texture_driver_gl;
extern const CoglDriverVtable _cogl_driver_gl;
#endif
#if defined (HAVE_COGL_GLES) || defined (HAVE_COGL_GLES2)
extern const CoglTextureDriver _cogl_texture_driver_gles;
extern const CoglDriverVtable _cogl_driver_gles;
#endif
extern const CoglDriverVtable _cogl_driver_nop;
typedef struct _CoglDriverDescription
{
CoglDriver id;
const char *name;
CoglRendererConstraint constraints;
/* It would be nice to make this a pointer and then use a compound
* literal from C99 to initialise it but we probably can't get away
* with using C99 here. Instead we'll just use a fixed-size array.
* GCC should complain if someone adds an 8th feature to a
* driver. */
const CoglPrivateFeature private_features[8];
const CoglDriverVtable *vtable;
const CoglTextureDriver *texture_driver;
const char *libgl_name;
} CoglDriverDescription;
static CoglDriverDescription _cogl_drivers[] =
{
#ifdef HAVE_COGL_GL
{
COGL_DRIVER_GL,
"gl",
0,
{ COGL_PRIVATE_FEATURE_ANY_GL,
COGL_PRIVATE_FEATURE_GL_FIXED,
COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE,
-1 },
&_cogl_driver_gl,
&_cogl_texture_driver_gl,
COGL_GL_LIBNAME,
},
{
COGL_DRIVER_GL3,
"gl3",
0,
{ COGL_PRIVATE_FEATURE_ANY_GL,
COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE,
-1 },
&_cogl_driver_gl,
&_cogl_texture_driver_gl,
COGL_GL_LIBNAME,
},
#endif
#ifdef HAVE_COGL_GLES2
{
COGL_DRIVER_GLES2,
"gles2",
COGL_RENDERER_CONSTRAINT_SUPPORTS_COGL_GLES2,
{ COGL_PRIVATE_FEATURE_ANY_GL,
COGL_PRIVATE_FEATURE_GL_EMBEDDED,
COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE,
-1 },
&_cogl_driver_gles,
&_cogl_texture_driver_gles,
COGL_GLES2_LIBNAME,
},
#endif
#ifdef HAVE_COGL_GLES
{
COGL_DRIVER_GLES1,
"gles1",
0,
{ COGL_PRIVATE_FEATURE_ANY_GL,
COGL_PRIVATE_FEATURE_GL_EMBEDDED,
COGL_PRIVATE_FEATURE_GL_FIXED,
-1 },
&_cogl_driver_gles,
&_cogl_texture_driver_gles,
COGL_GLES1_LIBNAME,
},
#endif
#ifdef USING_EMSCRIPTEN
{
COGL_DRIVER_WEBGL,
"webgl",
0,
{ COGL_PRIVATE_FEATURE_ANY_GL,
COGL_PRIVATE_FEATURE_GL_EMBEDDED,
COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE,
COGL_PRIVATE_FEATURE_GL_WEB,
-1 },
&_cogl_driver_gles,
&_cogl_texture_driver_gles,
NULL,
},
#endif
{
COGL_DRIVER_NOP,
"nop",
0, /* constraints satisfied */
{ -1 },
&_cogl_driver_nop,
NULL, /* texture driver */
NULL /* libgl_name */
}
};
static CoglWinsysVtableGetter _cogl_winsys_vtable_getters[] =
{
#ifdef COGL_HAS_GLX_SUPPORT
_cogl_winsys_glx_get_vtable,
#endif
#ifdef COGL_HAS_EGL_PLATFORM_XLIB_SUPPORT
_cogl_winsys_egl_xlib_get_vtable,
#endif
#ifdef COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT
_cogl_winsys_egl_wayland_get_vtable,
#endif
#ifdef COGL_HAS_EGL_PLATFORM_KMS_SUPPORT
_cogl_winsys_egl_kms_get_vtable,
#endif
#ifdef COGL_HAS_EGL_PLATFORM_GDL_SUPPORT
_cogl_winsys_egl_gdl_get_vtable,
#endif
#ifdef COGL_HAS_EGL_PLATFORM_ANDROID_SUPPORT
_cogl_winsys_egl_android_get_vtable,
#endif
#ifdef COGL_HAS_EGL_PLATFORM_POWERVR_NULL_SUPPORT
_cogl_winsys_egl_null_get_vtable,
#endif
#ifdef COGL_HAS_WGL_SUPPORT
_cogl_winsys_wgl_get_vtable,
#endif
#ifdef COGL_HAS_SDL_SUPPORT
_cogl_winsys_sdl_get_vtable,
#endif
_cogl_winsys_stub_get_vtable,
};
static void _cogl_renderer_free (CoglRenderer *renderer);
COGL_OBJECT_DEFINE (Renderer, renderer);
typedef struct _CoglNativeFilterClosure
{
CoglNativeFilterFunc func;
void *data;
} CoglNativeFilterClosure;
uint32_t
cogl_renderer_error_quark (void)
{
return g_quark_from_static_string ("cogl-renderer-error-quark");
}
static const CoglWinsysVtable *
_cogl_renderer_get_winsys (CoglRenderer *renderer)
{
return renderer->winsys_vtable;
}
static void
native_filter_closure_free (CoglNativeFilterClosure *closure)
{
g_slice_free (CoglNativeFilterClosure, closure);
}
static void
_cogl_renderer_free (CoglRenderer *renderer)
{
const CoglWinsysVtable *winsys = _cogl_renderer_get_winsys (renderer);
_cogl_closure_list_disconnect_all (&renderer->idle_closures);
if (winsys)
winsys->renderer_disconnect (renderer);
#ifndef HAVE_DIRECTLY_LINKED_GL_LIBRARY
if (renderer->libgl_module)
g_module_close (renderer->libgl_module);
#endif
g_slist_foreach (renderer->event_filters,
(GFunc) native_filter_closure_free,
NULL);
g_slist_free (renderer->event_filters);
g_array_free (renderer->poll_fds, TRUE);
g_free (renderer);
}
CoglRenderer *
cogl_renderer_new (void)
{
CoglRenderer *renderer = g_new0 (CoglRenderer, 1);
_cogl_init ();
renderer->connected = FALSE;
renderer->event_filters = NULL;
renderer->poll_fds = g_array_new (FALSE, TRUE, sizeof (CoglPollFD));
_cogl_list_init (&renderer->idle_closures);
#ifdef COGL_HAS_XLIB_SUPPORT
renderer->xlib_enable_event_retrieval = TRUE;
#endif
#ifdef COGL_HAS_WIN32_SUPPORT
renderer->win32_enable_event_retrieval = TRUE;
#endif
#ifdef COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT
renderer->wayland_enable_event_dispatch = TRUE;
#endif
return _cogl_renderer_object_new (renderer);
}
#ifdef COGL_HAS_XLIB_SUPPORT
void
cogl_xlib_renderer_set_foreign_display (CoglRenderer *renderer,
Display *xdisplay)
{
_COGL_RETURN_IF_FAIL (cogl_is_renderer (renderer));
/* NB: Renderers are considered immutable once connected */
_COGL_RETURN_IF_FAIL (!renderer->connected);
renderer->foreign_xdpy = xdisplay;
/* If the application is using a foreign display then we can assume
it will also do its own event retrieval */
cogl_xlib_renderer_set_event_retrieval_enabled (renderer, FALSE);
}
Display *
cogl_xlib_renderer_get_foreign_display (CoglRenderer *renderer)
{
_COGL_RETURN_VAL_IF_FAIL (cogl_is_renderer (renderer), NULL);
return renderer->foreign_xdpy;
}
void
cogl_xlib_renderer_set_event_retrieval_enabled (CoglRenderer *renderer,
CoglBool enable)
{
_COGL_RETURN_IF_FAIL (cogl_is_renderer (renderer));
/* NB: Renderers are considered immutable once connected */
_COGL_RETURN_IF_FAIL (!renderer->connected);
renderer->xlib_enable_event_retrieval = enable;
}
#endif /* COGL_HAS_XLIB_SUPPORT */
CoglBool
cogl_renderer_check_onscreen_template (CoglRenderer *renderer,
CoglOnscreenTemplate *onscreen_template,
CoglError **error)
{
CoglDisplay *display;
if (!cogl_renderer_connect (renderer, error))
return FALSE;
display = cogl_display_new (renderer, onscreen_template);
if (!cogl_display_setup (display, error))
{
cogl_object_unref (display);
return FALSE;
}
cogl_object_unref (display);
return TRUE;
}
typedef CoglBool (*DriverCallback) (CoglDriverDescription *description,
void *user_data);
static void
foreach_driver_description (CoglDriver driver_override,
DriverCallback callback,
void *user_data)
{
#ifdef COGL_DEFAULT_DRIVER
const CoglDriverDescription *default_driver = NULL;
#endif
int i;
if (driver_override != COGL_DRIVER_ANY)
{
for (i = 0; i < G_N_ELEMENTS (_cogl_drivers); i++)
{
if (_cogl_drivers[i].id == driver_override)
{
callback (&_cogl_drivers[i], user_data);
return;
}
}
g_warn_if_reached ();
return;
}
#ifdef COGL_DEFAULT_DRIVER
for (i = 0; i < G_N_ELEMENTS (_cogl_drivers); i++)
{
const CoglDriverDescription *desc = &_cogl_drivers[i];
if (g_ascii_strcasecmp (desc->name, COGL_DEFAULT_DRIVER) == 0)
{
default_driver = desc;
break;
}
}
if (default_driver)
{
if (!callback (default_driver, user_data))
return;
}
#endif
for (i = 0; i < G_N_ELEMENTS (_cogl_drivers); i++)
{
#ifdef COGL_DEFAULT_DRIVER
if (&_cogl_drivers[i] == default_driver)
continue;
#endif
if (!callback (&_cogl_drivers[i], user_data))
return;
}
}
static CoglDriver
driver_name_to_id (const char *name)
{
int i;
for (i = 0; i < G_N_ELEMENTS (_cogl_drivers); i++)
{
if (g_ascii_strcasecmp (_cogl_drivers[i].name, name) == 0)
return _cogl_drivers[i].id;
}
return COGL_DRIVER_ANY;
}
static const char *
driver_id_to_name (CoglDriver id)
{
switch (id)
{
case COGL_DRIVER_GL:
return "gl";
case COGL_DRIVER_GL3:
return "gl3";
case COGL_DRIVER_GLES1:
return "gles1";
case COGL_DRIVER_GLES2:
return "gles2";
case COGL_DRIVER_WEBGL:
return "webgl";
case COGL_DRIVER_NOP:
return "nop";
case COGL_DRIVER_ANY:
g_warn_if_reached ();
return "any";
}
g_warn_if_reached ();
return "unknown";
}
typedef struct _SatisfyConstraintsState
{
GList *constraints;
const CoglDriverDescription *driver_description;
} SatisfyConstraintsState;
static CoglBool
satisfy_constraints (CoglDriverDescription *description,
void *user_data)
{
SatisfyConstraintsState *state = user_data;
GList *l;
for (l = state->constraints; l; l = l->next)
{
CoglRendererConstraint constraint = GPOINTER_TO_UINT (l->data);
/* Most of the constraints only affect the winsys selection so
* we'll filter them out */
if (!(constraint & COGL_RENDERER_DRIVER_CONSTRAINTS))
continue;
/* If the driver doesn't satisfy any constraint then continue
* to the next driver description */
if (!(constraint & description->constraints))
return TRUE;
}
state->driver_description = description;
return FALSE;
}
static CoglBool
_cogl_renderer_choose_driver (CoglRenderer *renderer,
CoglError **error)
{
const char *driver_name = g_getenv ("COGL_DRIVER");
CoglDriver driver_override = COGL_DRIVER_ANY;
const char *invalid_override = NULL;
const char *libgl_name;
SatisfyConstraintsState state;
const CoglDriverDescription *desc;
int i;
if (!driver_name)
driver_name = _cogl_config_driver;
if (driver_name)
{
driver_override = driver_name_to_id (driver_name);
if (driver_override == COGL_DRIVER_ANY)
invalid_override = driver_name;
}
if (renderer->driver_override != COGL_DRIVER_ANY)
{
if (driver_override != COGL_DRIVER_ANY &&
renderer->driver_override != driver_override)
{
_cogl_set_error (error,
COGL_RENDERER_ERROR,
COGL_RENDERER_ERROR_BAD_CONSTRAINT,
"Application driver selection conflicts with driver "
"specified in configuration");
return FALSE;
}
driver_override = renderer->driver_override;
}
if (driver_override != COGL_DRIVER_ANY)
{
CoglBool found = FALSE;
int i;
for (i = 0; i < G_N_ELEMENTS (_cogl_drivers); i++)
{
if (_cogl_drivers[i].id == driver_override)
{
found = TRUE;
break;
}
}
if (!found)
invalid_override = driver_id_to_name (driver_override);
}
if (invalid_override)
{
_cogl_set_error (error,
COGL_RENDERER_ERROR,
COGL_RENDERER_ERROR_BAD_CONSTRAINT,
"Driver \"%s\" is not available",
invalid_override);
return FALSE;
}
state.driver_description = NULL;
state.constraints = renderer->constraints;
foreach_driver_description (driver_override,
satisfy_constraints,
&state);
if (!state.driver_description)
{
_cogl_set_error (error,
COGL_RENDERER_ERROR,
COGL_RENDERER_ERROR_BAD_CONSTRAINT,
"No suitable driver found");
return FALSE;
}
desc = state.driver_description;
renderer->driver = desc->id;
renderer->driver_vtable = desc->vtable;
renderer->texture_driver = desc->texture_driver;
libgl_name = desc->libgl_name;
memset(renderer->private_features, 0, sizeof (renderer->private_features));
for (i = 0; desc->private_features[i] != -1; i++)
COGL_FLAGS_SET (renderer->private_features,
desc->private_features[i], TRUE);
#ifndef HAVE_DIRECTLY_LINKED_GL_LIBRARY
if (COGL_FLAGS_GET (renderer->private_features,
COGL_PRIVATE_FEATURE_ANY_GL))
{
renderer->libgl_module = g_module_open (libgl_name,
G_MODULE_BIND_LAZY);
if (renderer->libgl_module == NULL)
{
_cogl_set_error (error, COGL_DRIVER_ERROR,
COGL_DRIVER_ERROR_FAILED_TO_LOAD_LIBRARY,
"Failed to dynamically open the GL library \"%s\"",
libgl_name);
return FALSE;
}
}
#endif /* HAVE_DIRECTLY_LINKED_GL_LIBRARY */
return TRUE;
}
/* Final connection API */
CoglBool
cogl_renderer_connect (CoglRenderer *renderer, CoglError **error)
{
int i;
GString *error_message;
CoglBool constraints_failed = FALSE;
if (renderer->connected)
return TRUE;
/* The driver needs to be chosen before connecting the renderer
because eglInitialize requires the library containing the GL API
to be loaded before its called */
if (!_cogl_renderer_choose_driver (renderer, error))
return FALSE;
error_message = g_string_new ("");
for (i = 0; i < G_N_ELEMENTS (_cogl_winsys_vtable_getters); i++)
{
const CoglWinsysVtable *winsys = _cogl_winsys_vtable_getters[i]();
CoglError *tmp_error = NULL;
GList *l;
CoglBool skip_due_to_constraints = FALSE;
if (renderer->winsys_id_override != COGL_WINSYS_ID_ANY)
{
if (renderer->winsys_id_override != winsys->id)
continue;
}
else
{
char *user_choice = getenv ("COGL_RENDERER");
if (!user_choice)
user_choice = _cogl_config_renderer;
if (user_choice &&
g_ascii_strcasecmp (winsys->name, user_choice) != 0)
continue;
}
for (l = renderer->constraints; l; l = l->next)
{
CoglRendererConstraint constraint = GPOINTER_TO_UINT (l->data);
if (!(winsys->constraints & constraint))
{
skip_due_to_constraints = TRUE;
break;
}
}
if (skip_due_to_constraints)
{
constraints_failed |= TRUE;
continue;
}
/* At least temporarily we will associate this winsys with
* the renderer in-case ->renderer_connect calls API that
* wants to query the current winsys... */
renderer->winsys_vtable = winsys;
if (!winsys->renderer_connect (renderer, &tmp_error))
{
g_string_append_c (error_message, '\n');
g_string_append (error_message, tmp_error->message);
cogl_error_free (tmp_error);
}
else
{
renderer->connected = TRUE;
g_string_free (error_message, TRUE);
return TRUE;
}
}
if (!renderer->connected)
{
if (constraints_failed)
{
_cogl_set_error (error, COGL_RENDERER_ERROR,
COGL_RENDERER_ERROR_BAD_CONSTRAINT,
"Failed to connected to any renderer due to constraints");
return FALSE;
}
renderer->winsys_vtable = NULL;
_cogl_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_INIT,
"Failed to connected to any renderer: %s",
error_message->str);
g_string_free (error_message, TRUE);
return FALSE;
}
return TRUE;
}
CoglFilterReturn
_cogl_renderer_handle_native_event (CoglRenderer *renderer,
void *event)
{
GSList *l, *next;
/* Pass the event on to all of the registered filters in turn */
for (l = renderer->event_filters; l; l = next)
{
CoglNativeFilterClosure *closure = l->data;
/* The next pointer is taken now so that we can handle the
closure being removed during emission */
next = l->next;
if (closure->func (event, closure->data) == COGL_FILTER_REMOVE)
return COGL_FILTER_REMOVE;
}
/* If the backend for the renderer also wants to see the events, it
should just register its own filter */
return COGL_FILTER_CONTINUE;
}
void
_cogl_renderer_add_native_filter (CoglRenderer *renderer,
CoglNativeFilterFunc func,
void *data)
{
CoglNativeFilterClosure *closure;
closure = g_slice_new (CoglNativeFilterClosure);
closure->func = func;
closure->data = data;
renderer->event_filters = g_slist_prepend (renderer->event_filters, closure);
}
void
_cogl_renderer_remove_native_filter (CoglRenderer *renderer,
CoglNativeFilterFunc func,
void *data)
{
GSList *l, *prev = NULL;
for (l = renderer->event_filters; l; prev = l, l = l->next)
{
CoglNativeFilterClosure *closure = l->data;
if (closure->func == func && closure->data == data)
{
native_filter_closure_free (closure);
if (prev)
prev->next = g_slist_delete_link (prev->next, l);
else
renderer->event_filters =
g_slist_delete_link (renderer->event_filters, l);
break;
}
}
}
void
cogl_renderer_set_winsys_id (CoglRenderer *renderer,
CoglWinsysID winsys_id)
{
_COGL_RETURN_IF_FAIL (!renderer->connected);
renderer->winsys_id_override = winsys_id;
}
CoglWinsysID
cogl_renderer_get_winsys_id (CoglRenderer *renderer)
{
_COGL_RETURN_VAL_IF_FAIL (renderer->connected, 0);
return renderer->winsys_vtable->id;
}
void *
_cogl_renderer_get_proc_address (CoglRenderer *renderer,
const char *name,
CoglBool in_core)
{
const CoglWinsysVtable *winsys = _cogl_renderer_get_winsys (renderer);
return winsys->renderer_get_proc_address (renderer, name, in_core);
}
int
cogl_renderer_get_n_fragment_texture_units (CoglRenderer *renderer)
{
int n = 0;
_COGL_GET_CONTEXT (ctx, 0);
#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES2)
if (cogl_has_feature (ctx, COGL_FEATURE_ID_GLSL) ||
cogl_has_feature (ctx, COGL_FEATURE_ID_ARBFP))
GE (ctx, glGetIntegerv (GL_MAX_TEXTURE_IMAGE_UNITS, &n));
#endif
return n;
}
void
cogl_renderer_add_constraint (CoglRenderer *renderer,
CoglRendererConstraint constraint)
{
g_return_if_fail (!renderer->connected);
renderer->constraints = g_list_prepend (renderer->constraints,
GUINT_TO_POINTER (constraint));
}
void
cogl_renderer_remove_constraint (CoglRenderer *renderer,
CoglRendererConstraint constraint)
{
g_return_if_fail (!renderer->connected);
renderer->constraints = g_list_remove (renderer->constraints,
GUINT_TO_POINTER (constraint));
}
void
cogl_renderer_set_driver (CoglRenderer *renderer,
CoglDriver driver)
{
_COGL_RETURN_IF_FAIL (!renderer->connected);
renderer->driver_override = driver;
}
CoglDriver
cogl_renderer_get_driver (CoglRenderer *renderer)
{
_COGL_RETURN_VAL_IF_FAIL (renderer->connected, 0);
return renderer->driver;
}
void
cogl_renderer_foreach_output (CoglRenderer *renderer,
CoglOutputCallback callback,
void *user_data)
{
GList *l;
_COGL_RETURN_IF_FAIL (renderer->connected);
_COGL_RETURN_IF_FAIL (callback != NULL);
for (l = renderer->outputs; l; l = l->next)
callback (l->data, user_data);
}
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